What is the main reason that Absolute Zero has not been achieved under laboratory conditions?

What is the percentage of hydrogen in c2h4

Exit what is the density of an object having a mass of 5.0 g and a volume of 45.0 cm3?

What is the importance of interlocking the fingers and rubbing while washing hands? the palms are the dirtiest parts of the hands. the spaces between the fingers get washed. the backs of the hands get washed. the fingernails are the dirtiest parts of the hands